Achlys Spider Demon in Sleyterra | World Anvil

Achlys Spider Demon

Summoning

Human sacrifice is the only way to summon the demon Achlys Spider. One can only summon this demon on an altar made of gold and silver, and as the spell is spoken, the sacrificial blood spills over the altar's sides. It encircles it, forming a circle summoning circle around the altar.

Once the circle is fully formed, the blood will slowly rise up into the demon's shape. The Achlys Spider has a female body with bat wings and spider fangs that protrude from her mouth. Her figure is grotesque, and upon seeing it for the first time, party members will roll a d20 to determine if they are affected by fear.

Her expression is twisted with agony, and her head can rotate clockwise at will. Achlys uses her wings to attack and fly into the air and can split venom from the fangs in her mouth. She is taller than most humanoids with her slender, curvy body. She feeds on the emotion of fear and despair and becomes empowered by it if she feeds enough. This empowerment allows her to take on the form of a spider, shredding her wings and growing four long spider legs protruding from her back two of these legs keep her floating up slightly off the ground. The other two legs are each equipped with a sharp talon.


Weaknesses

Attacks of this type deal twice the damage

Fire

Bludgeoning


Environmental Features that cause disadvantage to challenge and saving rolls for Achlys:

Light

Sunlight



Abilities - Attacks - Spells


Wing Strike - Multi Attack - Melee

Action Cost: Action

Range: Melee, 5feet

Damage Type: Bludgeoning

Dice Mechanics: 2d6 per strike


Discription:

Achlys will attack up to two times with her wings. She may target up to two oponents with this attack. If Fear Syphon has allowed her wings to turn into spider legs then this attack is no longer available, but it opens up the option of Talon Strike.


Talon Strike - Multi Attack - Melee

Action Cost: Action

Range: Melee, 5feet

Damage Type: Piercing

Dice Mechanics: 2d8 per strike


Description:

After a successful use of Fear Syphon, Achlys will gain the ability to use two legs that protrude from the top of her shoulders to attack with a fierce piercing blow.


Bite Attack - Melee

Action Cost: Action

Range: Melee, 5feet

Damage Type: Piercing, Poison (Constitution Challenge: 13 or higher on a d20)

Dice Mechanics: 1d8 Piercing + 6 Poison (3 Poison on a success to resist the poison)


Discription:

Achlys bites down on an oponent with her large fangs. Poison is pumped into the taget causing additional damage. Failing the constitution challenge will cause the target to take an additional 3 poison damage at the start of their next 3 turns. Saving the constitution challenge will prevent the additional rounds of damage.


Fear Syphon - Ability

Casting Time: Bonus Action

Range:100 feet

Dice Mechanics: Constitution Challenge: 16 or higher on a d20 roll


Description:

Achlys lets out a piercing scream and targets one creature within range to intimidate. She reaches into the mind of her target and syphons the fear from them and while causing no damage it allows her to change to her spider form. This allows her to use the powerful Talon Strike attack.


Acid Spray - Ability

Action Cost: Bonus Action

Range: Ranged, 10foot cone

Damage Type: Poison (Constitution Challenge: 13 or higher on a d20)

Dice Mechanics: 2d4 (half damage on a successful challenge)


Description:

Stretching her fangs forward, Achlys releases a cone of poison spray at her targets.

The Achlys Spider Demon was originally based on a commissioned demon. Original content was provided by Shadow Malachi. Contact them to comission your own creature.

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